Prevent Regex::new() from panicking when a non-AST item is repeated #20238
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This bug has also affected the regex! macro, which has caused an ICE when such an invalid expression is provided. Fixes rust-lang#20208.
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This bug has also affected the `regex!` macro, which has caused an ICE when such an invalid expression is provided. Fixes #20208.
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This bug has also affected the
regex!macro, which has caused an ICE when such an invalid expression is provided.Fixes #20208.